| US Arena Open Cup | |
| Sport: | Indoor soccer |
| Founded: | 2008 |
| Champion: | Metro Louisville FC |
| Champ Season: | 2021-22 |
| Most Successful Club: | San Diego Sockers (3) |
| Website: | U.S. Open Championship |
| Related Comps: | MASL, PASL |
The United States Open for Arena Soccer is a cup-style tournament for all Major Arena Soccer League, MASL2, MASL3 and Premier Arena Soccer League teams. Established in 2008, the PASL announced they would hold the first tournament for indoor soccer open to all leagues and/or existing teams.
| Season | Champion | Score | Runner-up | |
|---|---|---|---|---|
| 2008–09 | St. Louis Illusion | 8–3 | Detroit Waza | |
| 2009–10 | San Diego Sockers | 11–7 | Louisville Lightning | |
| 2010–11 | San Diego Sockers | 13–6 | Cincinnati Kings | |
| 2011–12 | San Diego Sockers | 13–6 | Cincinnati Kings | |
| 2012–13 | Detroit Waza | 7–6 | San Diego Sockers | |
| 2013–14 | Chicago Mustangs | 14–5 † | Hidalgo La Fiera | |
| 2014–15 | none (no tournament due to inaugural WMF World Cup)[1] | -- | -- | |
| 2021–22 | Metro Louisville FC | 4–0 [2] | State Line Falcons |
† Also PASL Ron Newman Cup Championship